Getting the number of CPUs

Hi there,
I am writing threaded code, that is computationally expensive. I want one thread to run on exactly one CPU. How can I get the number of CPUs in Java to set up the correct number of threads?
Thanks for your help!

I am not aware of a method to conrol the running thread and cause it to run only on single CPU, I don't htink this can be done in java only, however you can defenitly get the number of available CPUs, using java.lang.Runtime there 's a method called availableProcessors() . Ex:
int processorsNum = Runtime.getRuntime().availableProcessors();
this should return the number of available processors.

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